Kelly, hi - so sorry to hear about your injury. Glad you saw a doctor but I do find his diagnosis extraordinary without an x-ray. Though these well trained and experienced country doctors certainly do know their stuff!! The thing is, if you have torn a tendon off a bone and/or fractured a bone you will not be walking anywhere in two days, your Camino will be over and you on your way home for an x-ray followed by diagnosis and treatment ... so I hope that he has suggested the worst and that the reality is less.
In the hope that it is a lesser trauma the answer is that familiar RICE - rest, ice, compression, elevation. The doctor has done the compression though you are now a little late for the ice. Rest and elevation are the most important for you - and this does indeed mean rest - not hobbling around town being a tourist - it means elevation and rest - and we all know how hard that is to do.
Ibuprofena as pills and gel - anti-inflammatory topical gel will help as will taking as pills internally - if, and only if you know your body can tolerate them - an easy way to get stomach ulcers otherwise - which is why they are taken with food (immediately before, during, or immediately after a meal and a good habit is to take them during your meal with a large glass of milk added to your meal), and just in case you have never taken them it is worth knowing that a very very few number of people are terribly allergic to them.
The body produces local inflammation after a trauma (as you now know!!). It does this by releasing particular enzymes, one of which produces prostaglandins, which 'make' the inflammation - your body telling you to not use that part of the body works really well!!
So, anti-inflammatories 'switch off' the production of the enzymes and therefore stops inflammation - a neat trick and is why we take them.
You can buy over the counter painkilling anti-inflammatories - NSAIDs .. non-steroidal anti-inflammatories ... at any pharmacy and Voltaren gel seems to be the pilgrim favourite.
I do so hope that you get better really soon ... could I suggest? if no improvement within 48 hours that you get to Logrono hospital and have an x-ray ... and then go from there.
Until then - and it may be best to get to Logrono now anyway - take a taxi, sit in the back with leg across seat - rest that ankle, always put it on a chair when sitting so that it is at waist height, or lie on a bed. When you stand the blood flows down to your feet and it will swell, be painful, and slow healing - so, Kelly, listen now - Rest!!
And I so hope that after just a few days you can be back on Camino.